i think unless you are trained, that almost everyone will be in disbelief and the brain simply isnt processing and sending signals in that moment.
She said they were all just coming out to see what commotion was all about - so it wasnt like they knew a terrorist act was happening, just heard the crash and went out to see.
Said whoever yanked her back inside, yanked her out of her shoes ( she lost them )
and thanks whoever it was.